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IB DP ESS — Topic 7: Natural Resources | SL & HL | Paper 1 & Paper 2
🎯 Learning Intentions By the end of this note, you will be able to:
- Define natural capital and ecosystem services using IB-aligned ESS terminology, distinguishing between the stock and the flow of environmental value.
- Distinguish between the four categories of ecosystem services: provisioning, regulating, cultural, and supporting services, with named real-world examples of each.
- Explain how the degradation of natural capital leads to the loss of ecosystem services, and how this affects human well-being at local, regional, and global scales.
- Analyse the concept of natural capital valuation using relevant ESS analysis parameters: scale, perspectives, sustainability, and trade-offs.
- Evaluate the strengths and limitations of assigning monetary value to ecosystem services as a strategy for environmental conservation.
- Discuss contrasting worldviews — ecocentric, anthropocentric, and technocentric — in relation to the valuation and management of natural capital.
- Describe the findings of the Millennium Ecosystem Assessment and their implications for sustainability and environmental decision-making.
Real-World Context & Relevance
In 2005, the United Nations published the findings of the Millennium Ecosystem Assessment (MA), the most comprehensive audit of the planet's living systems ever conducted. Involving more than 1,300 scientists across 95 countries, the report concluded that approximately 60% of the ecosystem services examined — including freshwater regulation, fisheries, air and water purification, and natural hazard protection — were being degraded or used unsustainably. The economic implications were staggering: a 2014 study published in the journal Global Environmental Change by Robert Costanza and colleagues estimated the total value of global ecosystem services at approximately US$125 trillion per year — more than one and a half times the entire global GDP at the time (Costanza et al.).
Yet despite this extraordinary value, ecosystem services rarely appear on national balance sheets or corporate profit-and-loss accounts. When a mangrove forest in the Philippines is cleared for a shrimp farm, the economic gain from aquaculture is recorded; the loss of storm protection, fish nursery habitat, and carbon sequestration is not. When the 2004 Indian Ocean tsunami struck coastlines across South and Southeast Asia, communities sheltered behind intact mangrove belts experienced dramatically lower mortality than those where mangroves had been cleared — a stark demonstration that natural capital is not an abstract concept but a matter of life and death (Danielsen et al.).
🌍 Why This Matters The way societies account for — or fail to account for — natural capital determines whether ecosystems are protected or destroyed. Understanding natural capital and ecosystem services is foundational to every major environmental challenge of the 21st century: climate change mitigation, biodiversity conservation, food security, and sustainable development. Without this framework, environmental decision-making remains economically blind to the true cost of ecological degradation.
Core Concepts & Definitions
To understand why ecosystems matter economically and ethically, we first need a framework that treats the natural world not as a backdrop to human activity but as a productive system